1.17Mm Width, 4.0Mm Min Bore, Guhring Lh Full Radius I.D. Groove System 104 Insert, 17Mm Reach, Nano-A Coated 1.17Mm Width, 1.00Mm Depth, 17Mm Reach Ge104.0117.058.17.40.L, Nano-A Coated Type Ge104 Guhring Micro-Precision System 104 Carbide Stick Insert With 4Mm Quick Change Shank For Internal Grooving Full Radius Slots. Guhring Series No. 25135 Order Code 4.011 Made In Germany, Guhring Part #9251350040110 Guhring Inc.